I was less than a year old when my Dad shot the bear. It was right outside our trailer. He shot it because there were lots of small children in the camp and the bear was hanging about.
Dad never hunted for trophies etc. i think that was his only conquest. I believe they buried it.
The camp was in the wilderness and they were building forestry roads.
I have never smelled anything from a bear.
Skunks on the other hand yuck. The smell is disgusting. I think they might release more if they are threatened.
They used to go down the side of our house where our bedroom window was. The smell can wake you from a deep sleep. DH hates it.
I once saw two baby skunks in my garden playing and wrestling. They were letting off little puffs of scent. Cute.
It smells truly awful. Some marijuana has a similar smell but not as strong. I smell it in our local green space as people smoke pot (legal here) there.
As far as invasive species, we have some too. But if they are not too destructive of habitat I tend to just think of earthworms and bees, which I have read were invasive.
I know about the grey/red squirrel problem in England.
Thanks for the thread and letting me blather on OP!